Difference Between Rendering and Plastering - A Complete Guide

Difference Between Rendering and Plastering - A Complete Guide

Introduction

Plastering and rendering are two terms we can use interchangeably to refer to one that enhances the look and durability of walls. Although the two techniques serve the same function, i.e, covering and protecting walls, they are not interchangeable. In the world of Kromrych Builders, it is crucial to identify when one needs rendering and when one needs plastering, as both are vital to the look and structural integrity of a building, whether a residential or a commercial one.

Therefore, this is an extensive guide on the difference between plastering and rendering, what it is, and what to do if you don’t know which is best for your walls. By the end of this article, you will be to understand what plastering and rendering is really about, the pros and cons of plastering and rendering.

What is Plastering? – A Guide to Internal Wall Coating

Traditionally plastering is used to coat internal walls and ceilings in order to achieve a smooth even surface. Gypsum, lime, or cement are examples of fine material called plaster. It is laid on in layers until it sets and then smoothed out to achieve a perfect finish. Plastering is done in three forms i.e. skim coating, wet plastering, and dry lining, depending on what is required by the surface. Plasterboard, masonry or concrete surfaces are normally plastered with internal plastering.

Key Benefits of Plastering:

• Smooth Finish: Plastering creates a soft, hard-wearing surface that is perfect for painting or wallpapering.
• Insulation Benefits: Plaster offers some insulation properties, helping regulate temperature and sound within the home.
• Durability: Once dried, plaster forms a durable, long-lasting surface that provides solid support for interior walls.

What is Rendering a Wall? – The Exterior Wall Protection Guide

Rendering is the art of applying a protective material to exterior walls of a building. What is the meaning of render in construction? It is a fundamental technique for protecting the weather elements on external walls. However, this technique is not only decorative but can improve the façade of a building. Render is usually a mix of sand, cement and water, with additions of lime, acrylics or polymers to help strengthen and weatherproof it.

The render walls can be smooth, rough, or textured, depending on your taste. The plastering is mostly done inside, but the rendering walls are mostly done to plaster the exterior walls and the material is important for the structure of the building to protect the building from weather.

Key Benefits of Rendering:

• Weather Protection: Rendering of walls shields the building's exterior from moisture, wind, and other weather elements that could cause long-term damage.
• Aesthetic Enhancement: A render wall gives the exterior a fresh, modern, or sleek look, improving the overall curb appeal of the building.
• Increased Durability: The protective layer added by rendered walls offers additional strength and resistance against environmental wear and tear.

Difference Between Rendering and Plastering

Although both plastering and rendering involve applying a protective layer to a wall, they differ in several key ways. Here’s a breakdown of the primary differences:

1. Location

• Plastering: Mainly used for internal walls and ceilings.
• Rendering: Primarily applied to external walls to protect them from the elements.

2. Materials Used

• Plastering: Typically uses plaster made from gypsum, lime, or cement.
• Rendering: Composed of a mixture of cement, sand, and sometimes lime or acrylics for added strength and weather resistance.

3. Texture

• Plastering: Provides a smooth finish that is ideal for painting or wallpapering.
• Rendering: Can achieve a rough, textured, or smooth finish depending on the desired appearance for the wall render.

4. Purpose

• Plastering: Intended for creating a smooth, aesthetic surface for indoor use.
• Rendering: Applied to improve the appearance and provide protection to external walls from environmental damage.

5. Durability

• Plastering: While it is durable indoors, it is more prone to cracking under external stresses such as weather or physical impact.
• Rendering: Specifically designed to endure external conditions, rendering plaster offers greater resistance to weather elements and physical wear.

6. Process

• Plastering typically involves applying a base coat and a finishing coat of plaster, which are then smoothed and left to dry.
• Rendering involves applying multiple layers, starting with a base coat and then adding layers to achieve the desired plaster texture and finish. The rendering process is used on materials such as brick, concrete, or stone.

What is Wall Rendering?

Rendering to outside walls is called wall rendering. It has decorative and protective purposes. Untreated brick or concrete typically is not as durable as rendered walls, which can withstand rain, snow, and wind better.

Cement based renders, lime based renders and polymer based renders can all be used for wall rendering, depending on the finish or environmental conditions that are being catered for. Depending on where the building is located and the weather patterns that it is exposed to, the selected render material will vary.

The Rendering Process:

1. Preparation: The surface must be cleaned and roughened to ensure that the render adheres properly. This step may involve removing dirt, moss, or any previous coatings.
2. Base Coat: A base coat is applied to fill cracks or gaps and to ensure the wall is stable for the next layers.
3. Top Coat: A finishing coat is applied to achieve the desired texture and aesthetic look. The color can be added in this layer, or it may be left neutral for later painting.

Plastering or Rendering – What’s Best for Your Walls?

The choice between plastering, render or render plaster is down to the needs of your project. Plastering is best used on internal surfaces as a smooth finish to which paint or wallpaper can be applied. On the other hand, walls are designed for exteriors and they provide a shield from nature and its elements.

If your aim is to shield the outside of your building from the effects of weather while likewise enhancing its looks, then rendering is the most suitable alternative. In the case of attaining a smooth, polished surface for interior walls, plastering is the better option.

What is Rendering in Construction?

Rendering in construction is the application of a decorative and protective layer applied to the outside walls. Essential for improving durability and aesthetics is what’s render. Plaster renders are used as a finishing touch to the exterior, where as, cement renders are used to protect the building from weather damage. Rendering is a vital part of a construction and building maintenance process as this considerably enhances the building’s durability as well as visual quality.

The Rendering Process – Step-by-Step

The correct materials, such as cement, sand and water are mixed and applied to the exterior of the wall in layers. First you need to set each layer and then apply the next. The finish is smoothed or textured depending on the look desired. During the rendering process specialized tools like trowels and floater are used to give professional finish.

What’s Render Material?

Mixture used to coat the wall is referred to as render material. Render materials consist generally of sand, cement and lime with occasionally acrylics or polymers. What is the right mix depends on the finish you desire and the environmental conditions. For example, if a building is built in a coastal area with high humidity, then a better choice of a render wall material would be a durable and water resistant one.

Conclusion

Finally, when deciding on the best way to deal with your walls, it is important to understand the difference between plastering and rendering. Rendering is used to give external walls aesthetic value and weather protection whilst plastering offers the smooth decorative indoor finishes. When the right technique is used, your property will be durable and attractive.

As a plastering and rendering company, Kromrych Builders specialises in both plastering and rendering. Whether its for the interior or exterior of the home, our team has the experience and skills to achieve excellent results. You can get in touch with us today to find out how we can transform your space with our professional plastering rendering services.